Troubleshooting Guide
- 271 -
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Only for training and service purposes
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1. Defect of heat sink cooling fan
2. Defect of inverter compressor PCB
3. Loose connection of connector of cooling fan
4. Defect of temperature sensor of heat sink
Error
No.
Error Type Error Point Main Reasons
Heat sink over heat
Heat sink over heat
62
■ Error diagnosis and countermeasure flow chart
Is value of sensor
resistance normal?*
No
Does cooling fan
rotate while compressor
operation?
No
Yes
Replace cooling fan
Is resistance value
of cooling fan coil correct?
[refer electric
component part]
No
Replace main PCB
Replace sensor
Yes
Replace inverter fan PCB
Heat sink cooling fanPosition of cooling fan
drive connector in main PCB
Check DC 12V output during inverter
compressor operation
Heat sink temperature
sensor connection
Yes
* Heat sink temperature sensor (±5% tolerance) : 10°C = 20.0kΩ : 25°C= 10.0kΩ : 50°C= 3.5kΩ : 85°C= 1.0kΩ
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